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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 10    No. 1    February 2000

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Double reversible transformations under various treatment states①
BAI Yu-jun(白玉俊), SUN Dong-sheng(孙东升), GENG Gui-li(耿贵立), BIAN Xiu-fang(边秀房), WANG Shou-ren(王守仁)

College of Materials Science and Engineering, Shandong University of Technology, Jinan 250061, P.R.China

Abstract:The double reversible transformations at low temperature in CuZnAlMnNi shape memory alloy were investigated by differential scanning calorimetry. It is found that the transformations occur not only in the as-quenched sample, but also in the as-trained, as-aged and as-thermal cycled samples, and various treatments give rise to different influences on the transformation temperatures of the two transformations. Though the temperature interval between the two transformation peaks increases after training, aging and thermal cycling, the initial temperature of theM→Atransformation is just the final temperature of theX→Mtransformation, namely, theX→Mtransformation is immediately followed by theM→Atransformation upon heating.

 

Key words: double reversible transformations; CuZnAlMnNi shape memory alloy; training; aging; thermal cycling

ISSN 1672-7029
CN 43-1423/U

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